/*
 * The contents of this file are subject to the terms of the Common Development and
 * Distribution License (the License). You may not use this file except in compliance with the
 * License.
 *
 * You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
 * specific language governing permission and limitations under the License.
 *
 * When distributing Covered Software, include this CDDL Header Notice in each file and include
 * the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
 * Header, with the fields enclosed by brackets [] replaced by your own identifying
 * information: "Portions Copyright [year] [name of copyright owner]".
 *
 * Copyright 2008 Sun Microsystems, Inc.
 */
package org.forgerock.opendj.config;

/**
 * A visitor of default behavior providers, in the style of the visitor design
 * pattern. Classes implementing this interface can query default behavior
 * providers in a type-safe manner when the kind of default behavior provider is
 * unknown at compile time. When a visitor is passed to a default behavior
 * provider's accept method, the corresponding visit method most applicable to
 * that default behavior provider is invoked.
 *
 * @param <T>
 *            The type of values represented by the default value provider.
 * @param <R>
 *            The return type of this visitor's methods. Use
 *            {@link java.lang.Void} for visitors that do not need to return
 *            results.
 * @param <P>
 *            The type of the additional parameter to this visitor's methods.
 *            Use {@link java.lang.Void} for visitors that do not need an
 *            additional parameter.
 */
public interface DefaultBehaviorProviderVisitor<T, R, P> {

    /**
     * Visit an absolute inherited default behavior provider.
     *
     * @param d
     *            The absolute inherited default behavior provider to visit.
     * @param p
     *            A visitor specified parameter.
     * @return Returns a visitor specified result.
     */
    R visitAbsoluteInherited(AbsoluteInheritedDefaultBehaviorProvider<T> d, P p);

    /**
     * Visit an alias default behavior provider.
     *
     * @param d
     *            The alias default behavior provider to visit.
     * @param p
     *            A visitor specified parameter.
     * @return Returns a visitor specified result.
     */
    R visitAlias(AliasDefaultBehaviorProvider<T> d, P p);

    /**
     * Visit an defined default behavior provider.
     *
     * @param d
     *            The defined default behavior provider to visit.
     * @param p
     *            A visitor specified parameter.
     * @return Returns a visitor specified result.
     */
    R visitDefined(DefinedDefaultBehaviorProvider<T> d, P p);

    /**
     * Visit a relative inherited default behavior provider.
     *
     * @param d
     *            The relative inherited default behavior provider to visit.
     * @param p
     *            A visitor specified parameter.
     * @return Returns a visitor specified result.
     */
    R visitRelativeInherited(RelativeInheritedDefaultBehaviorProvider<T> d, P p);

    /**
     * Visit an undefined default behavior provider.
     *
     * @param d
     *            The undefined default behavior provider to visit.
     * @param p
     *            A visitor specified parameter.
     * @return Returns a visitor specified result.
     */
    R visitUndefined(UndefinedDefaultBehaviorProvider<T> d, P p);

}
